{E points] Using polar coordinates, compute {a} {4 points} the area of the region lying inside the curve {1:2 + yili = 2&2 ya} and uutsidathl: curves\" +y2 =1: {b} [4 points} and the area of the region lying insida the curve :2 + y? = 1 and outside the curve {1'2 + ya}? = 212:3 a]